Spark-coil.



A. R. LUSGHKA.

SPARK COIL.

APPLICATION FILED DEG. 11, 1907.

Patented Aug. 23, 1910;

4 SHEETS-SHEET 1.

A. R. LUSGHKA.

SPARK COIL.

APPLICATION FILED DBO. 11', 1907.

Patented Aug. 23, 1910.

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SPARK COIL.

APPLICATION rnnn mm. 11, 1907.

968,1 73. Patented Au 23, 1910.

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SPARK COIL.

APPLIUATION IILI-ID DEO.11, 1907,

968, 1 73. Patented Aug. 23, 1910.

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UNITED STATES PATENT OFFICE.

AUGUST R. LUSCHKA, OF CHICAGO, ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

SPARK-COIL.

Specification of Letters Patent.

Application filed December 11, 1907.

Patented Aug. 23, 1910. Serial No. 406,001.

T 0 all whom it may concern:

Be it known that l. AUGUST R. LUSCIIKA, citizen of Switzerland, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Spark-Coils, of which the following is a full, clear, concise, and exactdescription.

My invention relates to induction coils, and more particularly to the construction and arrangement of spark coils designed for use in connection with an electric ignition system for automobile gas engines.

The object of my invention is to provide a structure consisting of a plurality of spark coil units assembled as a whole and adapted to be mounted directly over the engine cylinders.

My invention in its preferred form contemplates a plurality of spark coil units, as, for example, one for each engine cylinder, arranged end to end and inclosed in a c lindrical case of such construction as Wlll permit the same to be mounted directly above the engine cylinders. Two heads, one of which is equi ped with binding posts for the primary coi s, close up the ends of the cylindrical mounting tube, while the sec ondary terminals are arranged along the side of the tube, as, for exam le, in the form of small removable sockets into which the high tension leads to the spark plugs are soldered or otherwise secured. I

The several features of my invention may be more readily understood by reference to the accompanying drawings, in which Figure 1 is a side elevation of the engine mechanism of an automobile and the spark coil tube mounted on the engine cylinders, parts being omitted and parts shown diagrammatically for sake of clearness; Fig. 2 1s a fragmentary longitudinal section of one end of the cylindrical tube; Fig. 3 is a similar View of the other end of the tube; Fig. 4 is an end view of one of the spark coil units, showing the inclosin tube in cross section; Fig. 5 is a diagram of the connections of the terminals of the primaries to the binding posts on the end of the inclosin tube; Fi 6 is a view of the end of the tu e on whic the binding posts are mounted; and Fig. 7 is a diagram of circuits and apparatus embodying my invention.

Similar letters of reference are used to designate similar parts in each of the figures of the drawings.

The spark coil units 28 are connected end to end by dowel pins 44, and the connected units are inclosed in a cylindrical tube 45 of-insulating fiber or other suitable material. The ends of said tube are closed by heads 46, 47. The head 47 is equipped with binding post 30 common to one terminal of each of the primary windings 29 of the induction coil 28, and also with individual binding posts 31, 32, 33, 34, 35 and 36, to which the other ends of said primary windings are connected.

It will be understood that in accordance with the usual practice one terminal of each of the secondary windings 41 is connected to a terminal of the primary, as indicated diagrammatically in Fig. 7, and the other terminal of each secondary is connected to a terminal plate 48 mounted on one end of each of the units 28. The secondary terminals may thus be arranged, as indicated in Figs. 1, 2 and 4, along the sides of. the tube 45 in the form of removable sockets 49, the stems of which pass through holes in the tube 45 and are threaded in the terminal plates 48.

As shownin Fig. 1, the tube 45 is supported directly above .the engine cylinders, being held by hoop clamps 50 supported on the ends of the angle pieces or brackets 51, which may in turn be mounted on the cylinders 43. The head 47 carrying the binding posts is adjacent the dash board 52 of the automobile on which the box 1 carrying the vibrating or interrupting mechanism is mounted. The commutating mechanism comprising, as usual, fixed segments 37, and

a rotating switch arm 38 is thus located.

carried by the head 47 with the segments 37 of the commutator. An especially desirable feature of this method of mounting the coils in proximity to the engine cylinder is that the high tension leads 53. extending from the secondary coils to the spark plugs 42 are very short, thus resulting in a considerable saving in installation, while leakages from the high tension cables of-the secondaries to the engine frame are entirely 2 a vided, one for recelving the common lead .The primary winding 29 is brought out at its opposite ends to clips 54, 55,.secured in radial channels upon the spool ends 556.v The clips 5% and 55 preferably extend in diametrically opposite directions, as indicated in full and dotted lines, respectively, in Fig.

ing to the other ends of said six primaries.

4. Each spool end 56 is provided with a plurality of channels 57 in its periphery,-for

the purpose of receiving the lead wires of the primaries. For sake of uniformity and in order than the units may be interchangeable, the same number of channels, similarly arranged, are provided in .each spool end of.

each of the units. For example, in case the assembled units are to be used in connection with a six cylinder engine, and where six spark coils are thereforepreferably' employed, seven of said channels 57 are. proto which one end of each of the primaries is connected, and the other six correspond- By referring to Fig. 5, it will be observed that one'lead coon to one terminal of all the primaries. extends through the alined channels 57 to the common binding post 30.

i The other endiof the primary of each induction coil extends through the interme-' diate alined channels 57 to its respective binding post. While all'of the channels 57 of all the units are not thus actually necessary, for the sake of uniformity,- as before ture.

stated, the units are madeidentical in struc- Referring more particularly to Fig.- 7,

. which shows diagrammatically a circuit-ar- .rangement for a six cylinder engine, one terof the primary wmdmgs 29 of the induction coil 28 is-connected by a common wire to the binding post-30, which is electrically connected to the post 15. The

minal of each 7 other terminal of 'each' of said primary windings is connected. to its corresponding binding post 31, 32, 33, 34:, 35 or 36. From said posts theprimary windings are led to corresponding segments 37 of the timing device, which may be of the usual construction, the circuit from any one of said segments being completedto ound -through the rotatably-mounted switc arm 38 of said timing device. Said timing device, it will be un from the driving shaft of the engine. By thus suitably constructing said timing device, the circuits of the primaries of the induction coil may be closed in sequence or as otherwise desired.

Batteries 39 and 40 are connected par erstood, is operated in the usual way team allel, onepole of each of said batteries benected respectively to the posts 24 and 25. When the battery switch 22 is in one position, as shown in Fig. 7 the battery 39 only is in circuit, when in the opposite position the current; is switched to battery 40, and

tion. said batteries are connected inmultiple.

The operation of the system as a whole may now beunderstoodv Assume that the vibrator switch lever 13, the battery switch pole of the-battery 39, through post 24, switch 22, one arm of the switch 20, the

17, switch 13, posts 15 and 30, to. the common lead of all the primaries of the spark coils binding posts 31, 32, 33, 341, 35, 36, to the segments 37 .ofthe commutator, the circuits through said segments and hence through the spark coils being closed successively to ground by the rotation of the switch arm 38 of the commutator or timing device. The opposite pole ofthe battery39 is also grounded through post 26, the other arm of the switch 20 and the grounded post 23. The above-described circuit through the primaries of the coils 28 is interru ted in the usual manner by the vibration o the inter rupter 9 of the vibrator .6, thus inducing current in the secondary of the spark coil whose circuit is' closed b the timm device. It

i It will be observed that by merely moving the lever 13 to its opposite position, the vibrator 5 may be substituted for. the vibrator 6. For instance, one of said vibrators, for example, the vibrator 6, may be adjustedto der and the vibrator 5 to produce a light spark. Hence to start the engine the vibe immediately overcome by switching to the alternative or emergencyvibrator.

I claim: v w 1. An'induction coil consisting of a s 001 22 and the combined battery and pole chang ingswitch 20 are in the positions shown in Fig. 7. A circuit is thus closed from one- 28, and from said primaries through the will be observed't at the sing e vibrator 6 t is used in connection with all the coils 28.

produce a heavy spark in the engine, cylmbrator 6 would be used; However after. the engine is fully warmed up, heavy sparks example, to a weak battery, the trouble may provided with a primary and a secon ary ing connected to the common binding post 26 and the opposite poles of each being conwhen said switch is inits intermediate posiwinding 7 of the vibrator 6, contacts 27 and iro being so adjusted that if the roduce winding, each end of said spool being provided with a plurality of channels in its periphery, each spool end being further provided with a radial channel communicating with one of said other channels, terminal clips for the primary connections arranged in said radial channels, and a secondary terminal plate carried by said spool.

2. Aninduction coil consisting of a spool provided with a primary and a secondary winding, each end of the spool being provided with one or more sockets for receiving dowel pins, whereby a plurality of such coils may be united end to end, each spool end being further provided with a plurality of channels in its periphery and with a radial channel communicating with one of said other channels, terminal "clips for the primary connections arranged in said radial channels,- and a terminal plate carried by said spool.

3. The combination with a cylindrical tube of insulating material, of a plurality of interchangeable spark coil 'units assembled end to end within said tube, each of said units consisting of a spool provided with a primary and a secondar winding, each end of the spool bein 'provi ed with one or more sockets for receiving dowel pins, whereby a plurality of such coils may be united end to end, each spool end bein further providedwith a plurality of c annels in its perpihery and with a radial channel, heads 'for closing the ends of said tube, binding posts for the primary leads mounted in one of said heads, and secondary terminals arranged longitudinally of said tube, said secondary, terminals comprising socket pieces renilovably secured to the secondary terminal lea s.

In witness whereof, I, hereunto subscribe my name {this 7th day of December, A. D.

Witnesses: I

RALPH G. J OHANSEN, RoY T. ALLOWAY.

AUGUST R. LUSCHKA. 

